If ever I see a cute baby and get broody twinges, I pause and mutter "toddlers, they mutate into toddlers" until the feeling passes. DS1 was a raging toddler from 10m until 5, and at 2 I added DS2 complete with SPD pregnancy, and tough recovery birth into the mix. 1-2/ 3-4 was crazy. DS1 would tantrum at everything and DS2 was either BFing, climbing or running away.
It
Was
Tough
Going off to work to teach teenagers was a refreshing break 😂
Things made a lot more sense with hindsight when DS1 was diagnosed with Dyspraxia and ASD some years later. TBH I'm not sure that he's alone with being ND in the household.
I quickly learned not to take the pair of them to the big town playground on my own... but I did build up a good rotation of smaller playgrounds that didn't get crowded and meant they could stay in sight.
I think they were about 4/2 when DS1 could stand in the swimming pool throughout and I was happy to take them solo. I've since found shallower pools that could have been viable earlier. Some pools have tightened up their parent: infant ratios though.
I can find the summer holidays tough so write lists of places/ things to do that are options, not a to-do list, and it makes it easier to think of ways to fill the time with practical activities.
There's a lot of things that never appealed to DS1. We have used screen time since 1, admittedly a lot at the point that my mobility was poor in a long, hard winter. I then used a timer on the TV to rein it in when I felt human again. I'd strategically arrange to be out of the room when the TV "broke" and the howling started. Over a couple of weeks, the howling reduced and stopped and he'd bimble off to do something else.
I reached the point with DS2 of going cold turkey on BFing at 20m for my sanity. He was well used to going a workday without, but instead of being happy with a morning / bedtime feed he became increasingly demanding. I told him that the milk was "all gone" and after a few days he broke the habit.
Don't be afraid of tantrums. Know what battles are worth fighting and plod on. (Our pb was 4 hours... that led to referal for ASD diagnosis)
It's hard to break tired habits when you're kmackered but it does pay off.
I haven't mentioned the DH issue. I don't know what the details are but as a general trend it's amazing how many DHs/ dads have mental health issues and get to abdicate from their family responsibilities. Much more so than the women ploughing on as much as they can... This unfair burden will have a lot to do with the overwhelm because you're doing the heavy lifting for a man-child on top of two demanding infants.